/ Dictionary / Index S symposiast: Meaning and Definition of Find definitions for: sym•po•si•ast Pronunciation: (sim-pō'zē-ast", -ust), [key] — n. a person who attends or participates in a symposium. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: symposiast (Thesaurus) symposiarch symposium Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language